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Rental Property Cash Flow Calculator .rpc-calculator-container { max-width: 800px; margin: 0 auto; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; background: #ffffff; border: 1px solid #e0e0e0; border-radius: 8px; padding: 30px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); } .rpc-header { text-align: center; margin-bottom: 25px; border-bottom: 2px solid #2c3e50; padding-bottom: 15px; } .rpc-header h2 { color: #2c3e50; margin: 0; font-size: 28px; } .rpc-grid { display: flex; flex-wrap: wrap; gap: 20px; } .rpc-col { flex: 1 1 300px; } .rpc-input-group { margin-bottom: 15px; } .rpc-input-group label { display: block; margin-bottom: 5px; font-weight: 600; color: #555; font-size: 14px; } .rpc-input-group input { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 16px; box-sizing: border-box; } .rpc-input-group input:focus { border-color: #3498db; outline: none; box-shadow: 0 0 5px rgba(52,152,219,0.3); } .rpc-btn-container { text-align: center; margin-top: 20px; margin-bottom: 25px; } .rpc-btn { background-color: #27ae60; color: white; border: none; padding: 12px 30px; font-size: 18px; font-weight: bold; border-radius: 5px; cursor: pointer; transition: background-color 0.3s; } .rpc-btn:hover { background-color: #219150; } .rpc-results { background-color: #f8f9fa; padding: 20px; border-radius: 6px; border: 1px solid #dee2e6; display: none; /* Hidden by default */ } .rpc-result-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid #e9ecef; } .rpc-result-row:last-child { border-bottom: none; } .rpc-result-label { font-weight: 600; color: #495057; } .rpc-result-value { font-weight: bold; color: #2c3e50; font-size: 18px; } .rpc-positive { color: #27ae60; } .rpc-negative { color: #c0392b; } .rpc-article { margin-top: 50px; color: #333; line-height: 1.6; } .rpc-article h3 { color: #2c3e50; margin-top: 30px; } .rpc-article p { margin-bottom: 15px; } .rpc-article ul { margin-bottom: 20px; padding-left: 20px; } .rpc-article li { margin-bottom: 8px; } @media (max-width: 600px) { .rpc-calculator-container { padding: 15px; } .rpc-grid { flex-direction: column; } }

Rental Property Cash Flow Calculator

Analyze your real estate investment performance

Acquisition & Loan

Income & Expenses (Monthly)

Investment Analysis

Monthly Principal & Interest: $0.00
Total Monthly Expenses: $0.00
Net Monthly Cash Flow: $0.00
Annual Cash Flow: $0.00
Cash on Cash Return (ROI): 0.00%

Mastering Rental Property Analysis

Success in real estate investing depends on the numbers. This Rental Property Cash Flow Calculator helps investors determine the viability of a potential investment by analyzing income, expenses, and financing costs. Understanding these metrics is crucial for building a profitable portfolio.

How to Calculate Rental Cash Flow

Cash flow is the money left over after all expenses are paid. The basic formula used in this calculator is:

  • Gross Income: Total rent collected per month.
  • Operating Expenses: Taxes, insurance, HOA fees, maintenance, and vacancy reserves.
  • Debt Service: The monthly mortgage payment (Principal and Interest).

Cash Flow = Gross Income – (Operating Expenses + Debt Service)

Understanding Cash on Cash Return (CoC)

The Cash on Cash Return is arguably the most important metric for rental investors. It measures the annual return on the actual cash you invested (down payment), rather than the total price of the property.

For example, if you invest $50,000 as a down payment and the property generates $5,000 in positive cash flow per year, your CoC return is 10%. This metric allows you to compare real estate returns against other investment vehicles like stocks or bonds.

What is a Good Cash Flow?

While "good" is subjective, many investors aim for:

  • Cash Flow per Door: $100 – $300 per month per unit.
  • Cash on Cash Return: 8% – 12% is generally considered a solid return in most markets, though aggressive investors may look for 15%+.
Use this calculator to stress-test your numbers. Try increasing the vacancy rate (in the 'Other Expenses' field) or the interest rate to see if the deal still makes sense in a downturn.

function calculateRentalCashFlow() { // 1. Get Input Values var price = parseFloat(document.getElementById('purchasePrice').value); var down = parseFloat(document.getElementById('downPayment').value); var rate = parseFloat(document.getElementById('interestRate').value); var years = parseFloat(document.getElementById('loanTerm').value); var rent = parseFloat(document.getElementById('monthlyRent').value); var tax = parseFloat(document.getElementById('propertyTax').value); var insurance = parseFloat(document.getElementById('insurance').value); var other = parseFloat(document.getElementById('otherExpenses').value); // 2. Validate Inputs if (isNaN(price) || isNaN(down) || isNaN(rate) || isNaN(years) || isNaN(rent) || isNaN(tax) || isNaN(insurance) || isNaN(other)) { alert("Please fill in all fields with valid numbers before calculating."); return; } // 3. Calculate Mortgage (Principal & Interest) var loanAmount = price – down; var monthlyRate = (rate / 100) / 12; var numberOfPayments = years * 12; // Mortgage Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ] var mortgagePayment = 0; if (rate === 0) { mortgagePayment = loanAmount / numberOfPayments; } else { mortgagePayment = loanAmount * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1); } // 4. Calculate Expenses and Cash Flow var totalMonthlyExpenses = mortgagePayment + tax + insurance + other; var monthlyCashFlow = rent – totalMonthlyExpenses; var annualCashFlow = monthlyCashFlow * 12; // 5. Calculate Cash on Cash Return // Formula: (Annual Cash Flow / Total Cash Invested) * 100 // Note: Assuming Closing Costs are negligible or included in downpayment for this simple calculator, // strictly it should be Down Payment + Closing Costs + Rehab. We use Down Payment here. var cashOnCash = 0; if (down > 0) { cashOnCash = (annualCashFlow / down) * 100; } // 6. Display Results document.getElementById('rpcResult').style.display = 'block'; // Formatting Helpers var fmtCurrency = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }); document.getElementById('resMortgage').innerText = fmtCurrency.format(mortgagePayment); document.getElementById('resTotalExp').innerText = fmtCurrency.format(totalMonthlyExpenses); var flowEl = document.getElementById('resCashFlow'); flowEl.innerText = fmtCurrency.format(monthlyCashFlow); if(monthlyCashFlow >= 0) { flowEl.className = "rpc-result-value rpc-positive"; } else { flowEl.className = "rpc-result-value rpc-negative"; } var annFlowEl = document.getElementById('resAnnualFlow'); annFlowEl.innerText = fmtCurrency.format(annualCashFlow); if(annualCashFlow >= 0) { annFlowEl.className = "rpc-result-value rpc-positive"; } else { annFlowEl.className = "rpc-result-value rpc-negative"; } var cocEl = document.getElementById('resCoC'); cocEl.innerText = cashOnCash.toFixed(2) + "%"; if(cashOnCash >= 0) { cocEl.className = "rpc-result-value rpc-positive"; } else { cocEl.className = "rpc-result-value rpc-negative"; } }

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